Made static library build with -fPIC for Rust.

Fixes #199.

CMakeLists.txt

@@ -1,6 +1,6 @@
 project(GLFW C)
 
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 2.8.9)
 
 set(GLFW_VERSION_MAJOR "3")
 set(GLFW_VERSION_MINOR "1")

README.md

@@ -72,6 +72,8 @@ GLFW bundles a number of dependencies in the `deps/` directory.
  - Added *partial and experimental* support for Wayland
  - Changed the default of `GLFW_REFRESH_RATE` to `GLFW_DONT_CARE` to maintain
    the default behavior
+ - Changed static library to build as position independent code for easier use
+   from the Rust language
  - Bugfix: The debug context attribute was set from `GL_ARB_debug_output` even
            when a debug context had not been requested
  - Bugfix: The particles example was not linked against the threading library

src/CMakeLists.txt

@@ -53,7 +53,8 @@ if (APPLE)
 endif()
 
 add_library(glfw ${glfw_SOURCES} ${glfw_HEADERS})
-set_target_properties(glfw PROPERTIES OUTPUT_NAME "${GLFW_LIB_NAME}")
+set_target_properties(glfw PROPERTIES OUTPUT_NAME "${GLFW_LIB_NAME}"
+                                      POSITION_INDEPENDENT_CODE ON)
 
 if (BUILD_SHARED_LIBS)
     # Include version information in the output